AJAX FireProtect 2 RB Heat, Smoke and CO Detector, Black and White
The AJAX FireProtect 2 RB is a wireless fire detector from the AJAX range of alarm components. It brings together heat, smoke and carbon monoxide (CO) detection in one compact unit, so a single device can give early warning of several different fire and gas hazards. This black and white version is supplied in a neutral colour scheme to blend with walls and ceilings in homes and commercial premises.
Fire and carbon monoxide incidents often develop quietly. Smoke can spread through a building before flames are visible, a heating fault can release CO without any obvious sign, and a slow temperature rise in a kitchen, loft or plant room can go unnoticed. A detector that watches for all three conditions helps close those gaps. The FireProtect 2 RB is intended for exactly this kind of mixed-risk environment.
How the detector works
The device uses three separate sensing functions. The heat sensor reacts to a rapid rise in temperature, which is typical of a developing fire. The smoke sensor responds to particles in the air from smouldering materials or open flames. The CO sensor monitors for carbon monoxide, a colourless and odourless gas produced when fuels such as gas, oil, wood or coal do not burn completely.
Key features
- Combined heat, smoke and carbon monoxide detection in one device
- Wireless operation as part of an AJAX alarm system
- Black and white colour version for a discreet appearance
- Suitable for retrofitting, since no mains cabling is needed for the link to the hub
- Reports to the AJAX hub, which can trigger the wider alarm system
Integration with an AJAX system
The FireProtect 2 RB is designed to work within the AJAX ecosystem. It communicates wirelessly with the central hub, so alarm events can be seen and acted on alongside intrusion sensors, keypads and other components. Users who already run an AJAX installation can add it without replacing their existing equipment. Before installation, check the hub and firmware compatibility described in the official AJAX documentation.
Typical uses
- Homes, especially kitchens, utility rooms, lofts and rooms with fuel-burning appliances
- Offices, shops and small commercial units
- Garages, workshops and storage areas where heat or smoke could build up
- Holiday homes and rental properties that need a safety device when unoccupied
- Upgrades to an existing AJAX alarm system that currently lacks fire or CO protection
Placement and planning
Good placement improves how quickly a detector responds. Fit units where smoke and heat are likely to collect, such as on ceilings in circulation areas and near, but not directly beside, cooking or heating appliances that can cause nuisance alarms. Carbon monoxide sensing works best when the device is placed where people sleep or spend time, and it should not be covered or obstructed. Follow the mounting guidance supplied with the product and any local fire safety regulations.
Why a combined detector helps
Using one device for several hazards simplifies the installation. Fewer components need to be mounted, paired and tested, and the readings all appear in the same system. This can be useful for property managers, small businesses and households that want a clear overview of fire and gas safety without managing a long list of separate units.
Care and maintenance
Like any safety device, the detector should be tested regularly according to the manufacturer’s instructions. Keep the sensing area free of dust, paint overspray and cobwebs, and check the status shown in the AJAX app or on the hub. Replace the detector or its power source when the system indicates it is needed, and never disable a fire or CO detector to avoid nuisance alarms.
The AJAX FireProtect 2 RB in black and white is a practical choice for anyone who wants heat, smoke and carbon monoxide protection integrated into a wireless alarm system.







